there are 103
Chlorine is the element in the halogen family located in period 3 of the periodic table.
Magnesium is in period 3 of the periodic table.
The atomic number of the element with the symbol Li, located in period 3 on the periodic table, is 3.
Group 17 elements (Halogens)Fluorine- Period 2Chlorine- Period 3Bromine-Period 4Iodine- Period 5Astatine- Period 6Ununseptium-Period 7There is 1 element from Group 17 that is part of Period 3.
The element in the 3rd period and 2nd group of the periodic table is magnesium (Mg).
Argon is in the third period of the modern periodic table.
Period 3. In the periodic table of elements you can decipher which period does an element belong by looking by the number of ROWS and which number is your element included in.
The element in group V of the periodic table with 3 electron shells is Phosphorus (P). Group V elements have 5 valence electrons and the number of electron shells corresponds to the period number on the periodic table, so a Group V element with 3 electron shells is in period 3.
The element in the fourth period with 3 3d electrons is titanium (element #22).
The first element in period three of the periodic table of chemical elements is sodium (Na).
Sulfur (S, element number 16) is on the third period of the periodic table.
The element Silicon (Si) is in the third Period on the Periodic Table. It is also the second element in Group 14(4) - The Carbon Family. It has 14 electrons in 3 shells, with 4 electrons in the outer shell.